Nailing Those Exams is a series of tips I write that focuses on how to get through the exams in each subject. Here I focus on Science – command and question words, science terms and how to get the hang of those QWC questions. To find out, read on…
Two atoms are walking down the street.
Suddenly one gasps, looks around him and turns to the other,
“OMG I’ve lost an electron!”
“Are you sure?” replies the other.
“Yes, I’m positive!”
This particular topic can be a little hard to get your head around, but hopefully you’ll find it simple after you’ve practised it a few times. In a basic terms, the empirical formula is the simplest way of writing a compound out. Oh, it doesn’t make sense yet? Don’t worry. It will. Probably.
This neat little trick might help you in an exam question – how to work how much of each element is in a compound.
Moles. What are moles? Moles mean molecular mass. Think mole. Think molecules. Moles can be a bit of a confusing subject at times, so hopefully we’ll clear up any confusion in the following crash course on moles and masses.